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He dabbed his “sweat mustache,” Rubio said. He flailed his arms in “full panic mode.”

And then, according to Rubio, Trump “asked for a full-length mirror.”

“I don’t know why, because the podium goes up to here,” he said, signaling his midsection. “I don’t know why — maybe to make sure his pants weren’t wet.”

Behold what the Republican presidential election has become. To try to take down Trump, one of his chief opponents acted just like him.

“He would be the oldest person ever [to be elected] president,” Rubio said of Trump, who will turn 70 in June. Rubio also gave a dramatic reading from the stage of Trump’s tweets mocking him. He purposely misread the ones where Trump misspelled words describing Rubio as “lightweight” and a “choker.”

“Some of the letters aren’t even close to each other on the keyboard!” Rubio marveled. “He must have hired foreign workers to handle his Twitter handle.”

He labeled Trump a “con man.”

Trump, meantime, branded Rubio “Mr. Meltdown” for flubbing his response to New Jersey Gov. Chris Christie in a previous debate.

“Once a choker, always a choker,” Trump declared at a news conference Friday in Fort Worth, where he received Christie’s endorsement.